Abrading and polishing machine



Jaime 3, 1924 J. CANNJNG ABRADING AND POLI$HING MACHINE 1919 3 Sheets-Stem. 1

Original Filed June 18 june i" 1924.

J. CANNING ABRADING AND POLISHING MACHINE H Original Filed June 18, 1919 3 Sheets-Sheet 2 June 3, 1924. 1,496,522

J. CANNING ABRADING AND POLISHING MACHINE Original Filed ne 18, 1919 s Sheets-Sheet 5 JAMES CANNING, OF ILLONTPELIER, VERMONT, ASSIGNOR T LANE MANUFACTURING COMPANY, OF IVIONTPELIER, VERMONT, A CORPORATION OF VERMONT.

[LBRADING AND POLISHING MACHINE.

Application filed June 18, 1919, Serial No. 305,132. Renewed April 12, 1924.

To all whom it may concern.

Be it known that I, JAMES CANNING, a citizen of the United States, residing at Montpelier, in the county of Washington and State of Vermont, have invented certain new and useful Improvements in Abrading and Polishing Machines, of which the following i is a specification.

Myinvention relates to grinding andpolishing machines, and more particularly to machines of this type adapted to smooth the surfaces of large blocks of stone; although in its useful applications the invention is not limited in all respects to this particular use.

Referring to the drawings Fig. 1 is a side view of a machine embodying my invention; 2 is a top plan view in which some parts are omitted and others are shown dia grammatically; Fig. 3 is a cross sectional view taken on the line TIL-IV of Fig. 2, looking ;in the direction of the arrow a. Fig. i is a section on the same line as Fig. 3, looki'ngin the direction of the arrow 6, Fig. 5 is a transverse sectional view taken on the line VV Fig;2; Fig. 6 is a detail plan View of features illustrated in Fig. 5; and Fig. 7 isa sectional view on the line VII VTI of Fig.2. Fig. 8 is a detail view in elevation, of the grooving cylinder.

Fig; 9 is a brokensectional view illustrating the appearance ofthe stone after being acted upon by the grooving cylinder.

In the drawings Z represents a block or stone being operated upon bythe machine to be described. The block as it comes from the quarry is placed upon a car 2' that is supported upon and travels along the tracks 3. A substantial and rigid framework, in which are mounted the principal operating parts of the machine, straddles the track 3 and is constructed to permit the car to pass between the uprights 4 thereof. These uprights are connected and braced by suitable horizontal tie pieces 5. In the stationary framework is mounted, so as to be capable of vertical adjustment, a frame 6, preferably rectangular in general outline, and con structed so as to possess the strength necessary to carry and properly support the principal moving parts of the machine. This movable frame is represented as being hung upon vertically disposed screw thread ed shafts 7 mounted so as to be free to turn in the stationary framework. The vertically movable frame '6 is provided with slides 8, that engage with ways 9 carried by the upright members of the stationary frame, these parts being constructed so that while permitting free vertical movements, of the frame 6, otherwise hold the frames rigidly with reference to each other. 'A rotary grinding or polishing cylinder 10 supported in the frame 6., This cylinder is formed of suitable material and constructed in any preferred manner. It is represented as being a built-up cylinder formed of sepa rate sections; but it might, so far. as this invention is concerned, be an integral piece. It is supported upon a shaft 11 that turns in bearings 16 carried by the movable frame 6. A motor is supported upon the frame 6', an electric motor 12 being represented, and this drives the grinding cylinder 10. The driving gearing represented consists of a pinion 13 upon the armature shaft 17 of the motor, meshing with an intermediate gear 14, which in turn meshes with along toothed gear on the grinding cylinder shaft 11. The armature shaft also carries a small belt pulley 18, that is connected, by the belt 19, with a larger pulley 20 on a shaft 21. parallel with the shaft 11. The shaft 21 carries a worm 22 secured fast to it and meshing with a worm wheel 23 on a vertically disposed shaft 25, supported by a .bracket 26 carried by the vertically movable frame 6. The worm wheel is provided, preferably on its under side, with a crank pin 24- carrylng an anti-friction roller that works in a slide 27. This slide is carried by a bracket 28 attached to a bar 29, parallel with the shafts 11 and 21 and mounted in bearings 30 on the frame 6, in which it is free to slide. The bar 29 has secured fast to it a pair of forks 31 the ends of which are adapted to lie between collars 32 secured fast to the shaft of the grinding cylinder.

From the foregoing description it will be seen that the motor, through the train of gearing, 13, 14, 15, rotates the grinding cylinder at a relatively rapid rate. While the cylinder is being rotated it has imparted to it longitudinal reciprocations these being slow as compared with the rotary motions of the cylinder. Such reciprocatory movements are imparted by the motor, through the train of gearing that has been described, including the rotating worm wheel 23 carrying the wrist or crank pin 24:, that slides the (Eli bar 29 back and forth in its bearings, and which, in turn, through the yoke arms 31, imparts corresponding sliding movements to the shaft of the grinding cylinder, causing the latter to move laterally over the face of the stone being dressed. The pinion carried by the shaft of the grinding cylinder has, as represented, a broad face permitting the longitudinal movements of the shaft 11 that have been just described without interfering with the gearing connections through which the grinding cylinder is rotated.

When the face of the stone Z is not very rough the grinding and smoothing cylinder 10, operated as described, will rapidly and effectively smooth the surface. It often happens, however, that the surface of the stone to be dressed is quite rough, and under such circumstances, in order not to impose too heavy a duty upon the smoothing cylinder 10, I use in combination therewith a preparatory dressing cylinder 33 adapted to cut grooves in the surface of the stone as represented at 2, thus reducing the material required to be removed by the cylinder 10 and leaving this material in condition to be easily attached and removed by such smoothing cylinder. The grooving cylinder 33 is supported in the frame 6 in advance of the cylinder 10. It is mounted upon a shaft 34 on which is secured a pulley 35 with which engages a belt 36 connecting it with a pulley on the armature shaft' of the motor 12.

During the operation of the machine there are constant streams of water and abrasive material that are delivered, through suitable conducting and distributing means 44, to the surface of the stone in proximity to the cylinders 10 and 33.

37 indicates a second motor that may be used for the purpose of moving the car 2 and for vertically adjusting the frame 6. It is connected with the vertical screw shafts 7 by which the frame 6 is moved up or down, in order to bring the working cylinders 10 and 33 into proper position to dress the surface of the stone that is to be operated upon, through a train of gearing, represented as a whole by 38, in which is included a clutch 39. This gear train may be of any usual or preferred arrangement that will simultaneously and synchronously turn the several screw shafts 9 at a slow speed. The clutch 39 is of any well known construction adapted for reversing the movements of the shafts 7 and for breaking the driving connection between them and the motor at the will of the operator. The car 2 is moved along the track 3, to carry the stone being treated beneath the dressing cylinders 33 and 10 at the proper speed, which is a very slow speed, preferably by means of a screw-threaded shaft 40 that engages with a split nut 41 secured to the under side of the car. The screw shaft 40 is driven by the motor 37 through a train of gearing e2 including a clutch 43, this clutch being similar in its operation to the clutch 39 already referred to. V

By mounting the motor 12 upon the vertically adjustable frame 6 and gearing it with the cylinder 10 so as both to rotate it and to reciprocate it as described insures that the cylinder shall be properly operated no matter what be the thickness of the stone operated upon or the consequent position to which the frame 6 may be adjusted.

What I claim is:

In a machine for dressing stone, the combination with a vertically adjustable frame arranged to be mounted above an article the surface of which is to be dressed, and a rotary cylinder supported in the vertically adjustable frame for acting upon and dressing the surface of the article, of a motor also supported by the frame, gearing connections between the motor and cylinder by which the latter is rotated, and driving connections between the motor and cylinder by which it is reciprocated on lines parallel with its axis of rotation while being rotated, the said gearing and driving connections being supported upon the adjustable frame, whereby operating connections are maintained notwithstanding adjustments of the frame.

JAMES CANNING. 

